using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel.DataAnnotations;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DataVAPI.ProcessServices.文件存储
{
    public class SqlContext<T> : DbContext where T : DataVModel, new()
    {
        public static SqlContext<T> Base = new();

        public SqlContext()
        {

        }

        public static string path
        {
            get
            {
                Directory.CreateDirectory(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "AccessFile"));
                return $"{AppDomain.CurrentDomain.BaseDirectory}AccessFile\\{typeof(T).Name}.db";
            }
        }

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            optionsBuilder.UseSqlite($"FileName={path}");
        }

        private static readonly object SqliteLock = new object();

        public DbSet<T> DbObj { get; set; }

        /// <summary>
        /// 保存数据
        /// </summary>
        public void Save()
        {
            Database.EnsureCreated();
            SaveChanges();
        }

        /// <summary>
        /// 添加或者更新
        /// </summary>
        /// <param name="obj"></param>
        public void AddToUpdat(T obj)
        {
            lock (SqliteLock)
            {
                var result = DbObj.FirstOrDefault(t => t.Id.Equals(obj.Id));
                if (result != null) result.json = obj.json;
                else DbObj.Add(obj);
                Database.EnsureCreated();
                SaveChanges();
            }
        }
        /// <summary>
        /// 添加记录
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public void Add(T obj)
        {
            lock (SqliteLock)
            {
                DbObj.Add(obj);
            }
        }

        /// <summary>
        /// 获取信息
        /// </summary>
        /// <param name="ID"></param>
        /// <returns></returns>
        public T GetInfo(string ID)
        {
            lock (SqliteLock)
            {
                Database.EnsureCreated();
                return DbObj.FirstOrDefault(t => t.Id.Equals(ID));
            }

        }

        /// <summary>
        /// 获取数据集合
        /// </summary>
        /// <returns></returns>
        public List<T> GetLists()
        {
            lock (SqliteLock)
            {
                Database.EnsureCreated();
                return DbObj.ToList();
            }
        }


        /// <summary>
        /// 删除信息
        /// </summary>
        /// <param name="orderID"></param>
        /// <returns></returns>
        public void Remove(string ID)
        {
            lock (SqliteLock)
            {
                var result = DbObj.FirstOrDefault(t => t.Id.Equals(ID));
                if (result != null)
                {
                    Remove(result);
                }
            }
        }

        /// <summary>
        /// 更新信息
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public void Update(T obj)
        {
            lock (SqliteLock)
            {
                var result = DbObj.FirstOrDefault(t => t.Id.Equals(obj.Id));
                if (result != null) result.json = obj.json;
            }
        }
    }

    public class DataVModel
    {
        [Key]
        public string Id { get; set; }
        public string json { get; set; }
    }
}